Heating-boiler.



E. B. BABOOGK & P. F. WIDHOLM.

HEATING BOILER.

APPLICATION FILED SEPT. 9, 1913.

1,101,776, Patented June 30,1914.

ff 7 /Z 25 m 25 f4 Fl g. 3..

WIT/1158858.- [WE/W085 d Gbtwm. [/W); 5. fiacac'k 21 COLUMBIA PLANOURAPH IO-,WASHINGTDN, D. c.

UNITED STATES PATENT OFFICE.

ELVIN B. BABGOCK AND PETER F. WIDHOLM, OF SEATTLE, WASHINGTON.

HEATING-BOILER.

Application filed. September 9, 1913.

The object of the invention is to improve the efliciency of boilers of this character both as to economy in the use of fuel and as to speed in which the heating of a volume of water may be attained.

lVith these ends in view, the invention consists in the novel construction and adaptation of devices, as will be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a front elevational view of a boiler embodying our invention and shown with the doors removed. Fig. 2 is a vertical section taken through 22 of Fig. 1. Fig. 3 is a horizontal section taken on line 33 of Fig. Fig. 4: is a detail longitudinal section through the inlet end of the gas burner such as shown in the other views.

Referring to the drawings, the numeral 5 designates the sides, Gthe back wall and 7 the top wall of the boiler casing. These walls are made hollow to provide therein water chambers 5 6 and 7 which communicate with each other as shown and constitute a water-jacket for a fire-box 8.

9 is the floor member of the fire-box and provided at the front is adoor or doors 10 to give access to the fire-box for cleaning purposes. Provided near the bottom of the fire-box is a smoke outlet 11 for connection with a suitable chimney, not shown.

Outlet openings are provided in the wall 7 for the flow of water from the upper chamber 7 into riser pipes, indicated by 12, of a house-heating system. The return pipes, indicated by 13, of such a system are connected with the lower ends of the chambers 5 A drain-pipe, such as 14, is provided for withdrawing the water from the boiler.

Interiorly of the fire-box 8 is provided a Specification of Letters Patent.

Patented June 30, 1914.

Serial No. 788,809.

plurality of pipe coils 15, as four for example. Each of said coils is connected by its end 16 withthe chamber 7 and by its other end 17 with a chamber 5 in proximity to the bottom of the latter. The coils are each composed of a number of substantially horizontal members 18, 18 and 18 etc., extending longitudinally of the firebox and are connected by return bends 19, 19 19 etc., so that the alternate members will be disposed at opposite sides of avertical plane extending longitudinally through the respective coils.

In carrying the invention into practice, we employ a gas burner of a novel type which will be now explained.

20 represents a ipe leading from a source of gas supply and is connected to a nozzle 21 (Fig. at) which protrudes axially into a flaring extension 22 provided on the open end of a tubular element, or burner proper, 23. The element 23 extends through and is rotatably seated in an opening 24: (Fig. 3) provided in one of the side walls 5 adjacent to the front and top of the fire-box. At the inner end of the burner the tube is formed with an enlargement 25 to provide therein a cushion-chamber 26 to equalize or render the discharge of the gas from the orifices more uniform. The referred to orifices, 27 are disposed to be in axial alinement with the respective aforementioned vertical planes l which are medial wlth the various coils. Each orifice is formed at the extremity of a branch to the tube 23 having near its extremity an internal cavity, as 28, of greater diameter than that of the respective branch and the orifice thereof. The extension 22 of the burnentube 23 is provided with an axially disposed boss 29 which is bored to receive the nozzle 21.

30 is an internally screw-threaded damper-plate engaging with screw-threads provided on the socket end 21 of said nozzle. The function of the damper-plate is to regu late the efiective area of the mouth of the burner part 22 to regulate the amount of air admitted therein to mix with the combustible gas which is discharged into the tube 23. The burner-tube 23 and its extension 22 thus afford a mixing chamber for the gases prior to being delivered through the orifices 27 to be consumed in tongues of flame, so to speak, which are normally directed toward the rear end of the boiler immediately below the under plate 7 of the top wall or the crown-- sheet of the fire-box. The burner-tube 23 may, however, be given a partial rotary movement about its axis through the medium of an operating handle 31 which is secured to the tube exteriorly of the boiler, to have the nozzles direct the flames to traverse horizontally the underside of the top wall 7 or be directed at an inclination downwardly within the respective coils.

32 represents'a battle-plate which prevents the flames or the gases produced from being drawn directly toward the smoke outlet 11.

The operation of the invention is as tollows: The burner is supplied with combustible gas through nozzle 21 and with air through the flaring part '22 of the burner to become mixed within. the burner-tube 23. Such mixture is discharged through the ori fices 27, is ignited and produces flames which extend towardt-he rear end of the tire-box. The combustible portions of the gases discharged from the burner will be almost entirely consumed at the top of the fire-box with the result that the water within the chamber 7 will be subjected to a greater heat than the water in any other portion of the boiler. The combustion products are then drawn downwardly, by the draft generated in the chimney, to escape through the outlet 11. In the descent of said products, the same are gradually cooled by contacting with the exposed surfaces of the pipe coils and the vertical Walls of the casing until there is but relatively little heat remaining in the gases as they flow through the outlet 11. The water, on the contrary, as it ascends in the pipe coils into the chamber 7 becomes progressively hotter. tions of travelof the currents of heating gases and water, the fuel is more completely consumed than if the flames first impinged the surfaces of the heater parts containing the cooler water; the burnt gases are more effectually separated from their heat so as to escape from the boiler at a temperature little in excess of the cooler portions of the boiler; and the water is heated so as to promote a local circulation thereof within the boiler to primarily heat the water so relatively hot therein as to afford a good circulation of the water throughout the heating system, of which the boiler constitutes a part of the riser side.

By such dispositions in the direc- What we claim is- 1. In a heating holler. having a wateracket provided with s1de members and a roof portion connecting said side members 'of selectively against the pipe-coils or the underside of said roof-portion of the water jacket.

2. In a heating boiler having a waterjacke't provided with side members and a roof portion connecting said side members and affording a fire-box within the waterjacket, said jacket being provided with a smoke outlet adjacent the lower end of said fire-box, a plurality of pipe-coils arranged within the fire-box to make communication between the "roofanember and the lower ends of said side members, a battle-plate pro vided intermediate the height of said firebox, a gas-burner extending into the fire box, said burner being disposed subjace-nt to the root POl'l/IOD. of the water-jacket and adapted to deliver the burning gas emitted from the orifices thereof into the space above said battle plate.

3. In heating boiler having a waterjacket provided with side members and a root portion connecting said side members and affording a firebox within the waterjacket, a plurality of pipe-coils arranged withinthe fire-box to make communication between the roof member and the lower ends of said side members, an axially adjustable gas burner extending into the firebox and provided with orifices opposite the respective pipe-coils, said burner being disposed subjacent to the roof-portion of the water jacket and adapted to deliver the burning gas emitted from the orifices thereof selectively against the pipe-coils or the underside of said roof-portion of the water-jacket.

Signed at Seattle, Wash, this 30th day of August, 1913.

ELVIN B. BABCOCK. PETER F. IVIDI'IOLM Witnesses PIERRE BARNES, E. Pn'rnnson.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents, Washington, D. C. 

